408/402 swap question

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Aug 14, 2006 | 04:27 PM

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From: Owasso, Ok

408/402 swap question

I'm going to be building an FI motor soon and am trying to debate between a fully build 346 or a 408/402 sized motor. When doing an LS2 402 or LQ9 408 swap, will the accessories swap as well? By accessories I mean AC, P/S, alternator, starter, etc. Or, will I need to buy all new accessories as well? What about the wiring? Does it just wire up or will I need to get a modified harness? Thanks

Aug 14, 2006 | 04:34 PM

98Z28CobraKiller

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From: WPB, FL

The 408 is a direct replacement.

Aug 14, 2006 | 05:36 PM

xaon

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From: Tomball, TX

all of those external accessories will bolt right over for either combo.

For the Aluminum LS2 block (402), i know you will need some new knock sensors and some extended wiring harnesses... possibly new covers as well?? I'm not 100% certain on exactly what is required when using an LS2 block in an f-body.